Sharp XG-PH50X Serviceanleitung Seite 43

Check S-Video signal input.
Go to "Checking the S-Video
signal circuit".
Are there signal "C" at C418
output?
Are there signal "Y" at C419
output?
YES
Are there signal "C" at emitter
of Q414 output?
Are there signal "Y" at emitter
of Q415 output?
YES
Are there signal at pin(7) of
IC406?
YES
CN3001 is not stable or
breakdown.
NO
Check C418, C419 and their
peripheral circuits.
NO
Check Q414, Q415 and their
peripheral circuits.
NO
Check IC406 and its
peripheral circuits.
43
XG-PH50X
XG-PH50X-NL